/// <summary>
/// Creates a function from the given source.
/// </summary>
/// <param name="source">The token iterator.</param>
/// <returns>The created function.</returns>
CSSFunction CreateFunction(IEnumerator<CssToken> source)
{
var name = ((CssKeywordToken)source.Current).Data;
var args = new CSSValueList();
//TODO
while (source.MoveNext())
{
if (source.Current.Type == CssTokenType.RoundBracketClose)
break;
}
return CSSFunction.Create(name, args);
}
public static Shadow ToShadow(this CSSValueList item)
{
if (item.Length < 2)
{
return(null);
}
var inset = item[0].Is("inset");
var offset = inset ? 1 : 0;
if (inset && item.Length < 3)
{
return(null);
}
var offsetX = item[offset++].ToLength();
var offsetY = item[offset++].ToLength();
if (!offsetX.HasValue || !offsetY.HasValue)
{
return(null);
}
var blurRadius = Length.Zero;
var spreadRadius = Length.Zero;
var color = Color.Black;
if (item.Length > offset)
{
var blur = item[offset].ToLength();
if (blur.HasValue)
{
blurRadius = blur.Value;
offset++;
}
}
if (item.Length > offset)
{
var spread = item[offset].ToLength();
if (spread.HasValue)
{
spreadRadius = spread.Value;
offset++;
}
}
if (item.Length > offset)
{
var col = item[offset].ToColor();
if (col.HasValue)
{
color = col.Value;
offset++;
}
}
if (item.Length > offset)
{
return(null);
}
return(new Shadow(inset, offsetX.Value, offsetY.Value, blurRadius, spreadRadius, color));
}
internal static Boolean CheckSingleProperty(CSSProperty property, Int32 index, CSSValueList arguments)
{
if (index < arguments.Length)
{
var argument = arguments[index];
property.Value = argument;
return(property.Value == argument);
}
return(false);
}
internal static CSSFunction Create(String name, CSSValueList arguments)
{
//TODO
return null;
}
internal static CSSFunction Create(String name, CSSValueList arguments)
{
//TODO
return(null);
}
/// <summary>
/// Determines if the given value represents a valid state of this property.
/// </summary>
/// <param name="value">The state that should be used.</param>
/// <returns>True if the state is valid, otherwise false.</returns>
protected override Boolean IsValid(CSSValue value)
{
var items = (value as CSSValueList ?? new CSSValueList(value)).ToList();
var images = new CSSValueList();
var positions = new CSSValueList();
var sizes = new CSSValueList();
var repeats = new CSSValueList();
var attachments = new CSSValueList();
var origins = new CSSValueList();
var clips = new CSSValueList();
CSSValue color = null;
foreach (var list in items)
{
CSSValue image = null, position = null, size = null, repeat = null,
attachment = null, origin = null, clip = null;
if (color != null)
{
return(false);
}
if (images.Length > 0)
{
images.Add(CSSValue.Separator);
positions.Add(CSSValue.Separator);
sizes.Add(CSSValue.Separator);
repeats.Add(CSSValue.Separator);
attachments.Add(CSSValue.Separator);
origins.Add(CSSValue.Separator);
clips.Add(CSSValue.Separator);
}
for (int j = 0; j < list.Length; j++)
{
var item = list[j];
if (_position.CanStore(item, ref position))
{
if (j + 1 == list.Length)
{
continue;
}
var pack = new CSSValueList();
pack.Add(position);
pack.Add(list[j + 1]);
if (_position.CanTake(pack))
{
positions.Add(position);
position = list[++j];
}
if (j + 1 < list.Length && list[j + 1] == CSSValue.Delimiter)
{
j += 2;
if (j < list.Length && _size.CanStore(list[j], ref size))
{
if (j + 1 == list.Length)
{
continue;
}
pack = new CSSValueList();
pack.Add(size);
pack.Add(list[j + 1]);
if (_size.CanTake(pack))
{
sizes.Add(size);
size = list[++j];
}
}
else
{
return(false);
}
}
}
else if (_repeat.CanStore(item, ref repeat))
{
if (j + 1 == list.Length)
{
continue;
}
var pack = new CSSValueList();
pack.Add(repeat);
pack.Add(list[j + 1]);
if (_repeat.CanTake(pack))
{
repeats.Add(repeat);
repeat = list[++j];
}
}
else if (!_image.CanStore(item, ref image) && !_attachment.CanStore(item, ref attachment) &&
!_origin.CanStore(item, ref origin) && !_clip.CanStore(item, ref clip) && !_color.CanStore(item, ref color))
{
return(false);
}
}
images.Add(image ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.None)));
positions.Add(position ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.Center)));
sizes.Add(size ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.Auto)));
repeats.Add(repeat ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.Repeat)));
attachments.Add(attachment ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.Scroll)));
origins.Add(origin ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.BorderBox)));
clips.Add(clip ?? new CSSPrimitiveValue(new CssIdentifier(Keywords.BorderBox)));
}
return(_image.TrySetValue(images.Reduce()) && _position.TrySetValue(positions.Reduce()) &&
_repeat.TrySetValue(repeats.Reduce()) && _attachment.TrySetValue(attachments.Reduce()) &&
_origin.TrySetValue(origins.Reduce()) && _size.TrySetValue(sizes.Reduce()) &&
_clip.TrySetValue(clips) && _color.TrySetValue(color));
}